Pettinaroli Radiator Lockshield Valves

Pettinaroli radiator lockshield valves

Pettinaroli radiator lockshield valves are used on the return side of radiator and heating systems. Installed at the radiator outlet, a micrometric lockshield supports flow adjustment, hydraulic balancing and isolation for maintenance. When selected and commissioned together with the inlet valve, it helps distribute heat more consistently throughout the system.

Pettinaroli is an Italian manufacturer of components for heating and water systems. Its nickel-plated radiator lockshield valves are suitable for houses, apartments, commercial properties and boiler-fed radiator circuits. The micrometric adjustment mechanism makes it easier to set the return flow according to the hydraulic design.

750R, 751R and 755R models

Pettinaroli 750R is a nickel-plated angle micrometric radiator lockshield with a female threaded connection. It is useful where the pipe approaches the radiator from the wall or floor at an angle. Pettinaroli 751R is the corresponding nickel-plated straight model with a female thread for installations where the pipe and radiator connection are aligned.

Pettinaroli 755R is a nickel-plated angle micrometric lockshield with a compression end. Manufacturer information states that it is supplied without fittings, so the compatible compression fitting must be selected separately. A version for a 16 mm line is available. Pipe material, outside diameter and the required compression set should therefore be confirmed before ordering.

How to choose

Selection depends on connection size, straight or angle layout, threaded or compression end, pipe type and installation direction. A 1/2-inch connection is common in radiator systems, but the final size must match both the radiator outlet and the project. During commissioning, the valve position should be set according to the system balancing calculation.

A reliable lockshield valve helps reduce leakage risk, simplifies radiator servicing and supports stable heating performance. Euroclima offers Pettinaroli 750R, 751R and 755R options for different installation layouts.